Blade-sharpening mechanism.



W. H. CRIOHTON-CLARKE. BLADE SHARPENING MECHANISM. APPLICATION FILED MAY16,1907.

Patented Aug. 11, 1914,

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WILLIAM H. CRICHTON-CLARKE, OF NEW YORK, N. Y., ASSIGNOR T0 GILLETTESAFETY RAZOR COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

BLADE-SHARPENING MECHANISM.

Specification of Letters Patent.

Application filed May 16, 1907.

Patented Aug. 11, 1914.. Serial No. 374,075.

-TON-CLARKE, a. citizen of the United St ates.

residing in the city of New York. borough of Manhattan, county and Stateof New York, have invented certain new and useful Improvements inBlade-Sharpening Mccha nism, of which the following is a full. cl an. I

10 at its outer end to receive a post- 11 can and exact specification. v

My invention relates to blade shar ')ening mechanism and the object ofmy invention is to produce a machine that will simultane ously operateon opposite edges of a doubleedged blade, and that will be adapted forindividual use and in connection with an ordinary razor strop. and tothat end my invention consists in the employment of a suitable holdingdevice for holding the blade and means for rocking the same. so that theopposite edges thereof shall simultaneously engage properly disposedabrading surfaces. such as a strop.

Figure 1 is an end elevation of one practicable form of my device inposition upon a st'rop. Fig. 2 is a side elevation of said device with ablade in position. partly broken away. Fig. 3 is a cross section on theline 3* of Fig. 1. Fig. 4 is an enlarged end view of the rocking memberand associated parts, partly in section. Figs. 5 and (1 are details ofthe blade support. Fig. T is a cross-section on the line 7 of Fig. 1.Fig. 8 is a detail of the returning spring for the rocking member.

Upon a frame plate 1 is mounted a pair of strop -guiding rollers 2, it,which are situated opposite each other upon said plate and receive thestrop A on their inner faces and guide it over a third roller 1. aroundwhich it passes. returning on itself in substantially parallel paths.thereby forming two sl1bstantially parallel stropping surfaces. B. (1.separated from each other a distance equal to the diameter of roller 1.

Wfithin the space between the normal positions of the said two stroppingsurfaces when the strop is in position with a portion bent itself, islocated a blade'lmlder. The bladeholder is shown mounted on a rod 5carried by the frame-plate 1. A sleeve 7 s mounted on the rod 5 forrotation. Lon gitudinal movement of the sleeve is pre vented by anenlarged head 1; forming an annular flange or shoulder carried by therod 5, at. its outer or free end. The blade holder is shown carried bythis sleeve and comprises a base plate 8 preferably flat to conform tothe shape of the blade and secured to or forming part of the sleeve. anda swinging clamping arm 5) hinged to the plate ')referabl v at its innerend. The arm 1 is shown provided with a perforation at ried by the plate8 and a retaining arm 12 which is hinged to said post. to swing over theclamping arm when it, is in its closed position for the purpose oflocking the i clamp in its closed or clamping position.

The blade to be sharpened. indicated by 13. is held trom edgewisemovement upon the base plate by some suitable means. Lugs 11- are showncarried by the plate 8 and located in position to pass thrtnigh suitableperforations in the blade and in the arm 9.

As the device is moved relatively to the strop as a whole theblade-holder will be rocked from side to side. The rocking means for theblade holder is shown comprising a pinion 113 fast with the inner end 15of the oscillatory sleeve 7. The pinion 16 is shown paced from the faceof the plate 1 by a washer 1? carried by the rod 5 between such pinionand frame. This pinion is in mesh with a sector rack 18 forming part ofa rocking member 19. The rocking member 19 is shown mounted on a stubshaft :20 carried by the frame plate 1. The rocking member is spacedfrom the face of the fran'ie plate by a washer 21. carried by the stubshaft. The rocking member is shown with a pair of flaring arms forming aspace between them within which is the sector rack 18 and the pinion1t). These arms are united at their outer ends by a sector having thestub sha ft 20 as a center. The face of the sector 22 is in position tobe engaged by the strop face B. The sector will be moved by the strop asthe same moves relatively to the stro 'iping machine, thereby, throughthe rack 18 oscillating the pinion '16 and causing the opposite edges ofthe blade 13 to bear upon the strop. For instance. if the strop ismoving in the direction of the arrow (Fig. 1), the rocking member 11)will cause the blade to be rocked so that edge 13 of the blade willcontact with part B of the st'r'op. and 1 will contact with part. andupon a reversal of the relative movement of the siirop and sfroppingi'neel'iine, the (slimming edges will aliornete and 13*" will engage ienci 18 will engage B.

For the :mrpose of facilimtingzj the freeing oi. the blade from thestrop and preventing the Cutting of the strep upon re 'ersill of strepmovement l provide elastically F l hold able means egnins; which theblade is I in eontacl with the six-op, and this may he 11 ihe form of@pring 23 coiled around A peat 24 seenrml to l mime en as to he wt ofthe path oi the siren ml having its two endmpeojecting up:

wily and passing on eeeh side of a pin no in the lower mm of the rockingn: mher 9 and a retaii'ong pin 26 i the "from E on a movement of theii'njiiki'i'-i, m 23 ill engage and h it one arm of the spring, and theurn: will remain in eonie,

v l. zedi,

fmni the drop and V x the blade to resume its norn'ml. idle nvention. Itohiii that numerous modi? aliens my imention nihont de piritthere-of,and 3 do not lie "we enmlfiv form hilt l clainil and desire to SPIYllli:by Lettezss Patent i9:

.5, razor etiomiing u double-edged oi) etropping mohine for strop ping21 Flo edged. blade, i-omprising a rocking blew; 5sp' !t.= adapted toexpose both edges of the blade, for aippoi-l i119: ahrmling' FUIEH'IQSon opposite sides of said support, in position to he engaged h bothsirles of both QGQCF; of will blade, and means f r rolilcing mid aiippo.'3 zwtimte'l n '20 elareding surfaces, subatentially as n: scribed.

A razor stropping inzwh-ine {or strep- ;ilng double-eclge i blade,comprising :1 making blade support, adapted to eipose both edges of thehide, means for supporting ahmding snfiaces on opposite sides of willsupport. in position to be engaged by both fliilGE; of both edges ofsaid hl=1Cle,\111d means: fOi' uni-king said. support actuated by herelative moiemeiit of the. machine and the ahrading smmz -es, and meansfor ZEllfl'hii" said, blade support to normal posilion.

initially described.

5. A P313301 slrogiping machine For $01113- ping: n lionhlewlgeil blade,comprising a roohing blade enpport, adapted to expose Booth evlgof Uhlacle, means for supporting alive-ling snrfisiin posilion to he engagedby both fill i9 ooih edges of seiil blade so disposed, thel: Elreleii've movement of said machine and Bani olnmiing surfaces willcans-e the same to travel in opposite irections on the oppoeiie sides ofsaid blade FSllD- port, and means ectuetml by such relative mo ement forVol. ing said blade support, substantially ea"; (lesci'ihmll 6 A razore'tronyio nmlfhine for stropping (hmhle-edgell blades, comprising aframe, strop guides, rollers mounted thereon, 1 fooling hlnde supportmounted in said heme intermeliiote mid guides, a rocking member mountedin sueh frame in the path of the (I v V *nnection between said rookingmeanne? :lml said blade support wherelw. as the 'T'Uifhiififl member ismoved the blade support is: rod zed, causing the opposite edges of theblade to simultanemisly engage said strep, subetaniaily as (lQQTl'llJGd.

T, A blade eisgiport for a flexible-edged razor blaile, min mising ahearing, a sleeve rote mhly mount d thereon, means on eeii'i sleeve forattaching a blade thereto and located in position to expose both edgesof the blade, and e clamping member pivoted t; said .eleeve,snlistantielly as described.

A siropping machine for double-edged razor hlmlee, comprising a frame, arocking blade ei'ippm't in said frame, strep guides in said fn-m'ze e0(liepoeecl as to cause said shop to move in oppos directions on theonposite sides of the blade support, a rocliing member engaging saidstrap, and a connection. between said rocking member and said zzii'op xneby, upon z'elative movement belween machine and said strop, the bladeis rockecl to cause its opposite edges to simultaneo islv engage/said str-o. at opposite eides upon movement in one irection, and upon the otherSid?? on a reverse of said movement, su'oetanlially as (lescribed.

9'. A shopping machine for donhle-eilgml razor hhlolvs, comprising aframe, :1 handle. stiogwguiiling rollers at opposite ends of said frame,a blade-supporting spindle intermediate said-rollers, a sleeve rotatablymounted therein, a blade clamp on said sleeve, a pinion likewise on saidsleeve, a

- rocking member ournaled in said 'ft'ame, a rocking surface therein inthe path of the strop, and a rack on said rocking member engaging saidpinion, substantially as described.

10. A stropping machine for; doubleedged razor blades comprising aframe, a handle, strop-guiding rollers at opposite ends of said frame, ablade supporting spindle intermediate said rollers, a sleeve rotatablymounted thereon, a blade clamp on said sleeve, a pinion likewise on saidsleeve, a rocking member jour-naled in said frame, a rocking surfacetherein in the path of the strop, a rack on said rocking member engagingsaid pinion, and a spring for automatically'returning said rockingmember to upright position, substantially as described 11. A stroppingmachine for double edged razor blades, comprising a strop, a frame, ahandle,'strop-gu1ding rollers at opposite ends of said frame,abl'ade-supporting spindle intermediate said rollers, aslceve rotatablymounted thereon, a blade clamp on said sleeve, a pinion likewise on saidsleeve, a rocking member journaled in said frame, a rocking surfacetherein in the path of the strop, a recess at the end of said strep forreceivingsaid rocking surface, and a rack on said rocking memberengaging said pinion, substantially as describe 12. A stropping machinefor doubleedged razor blades, comprising a frame, strop-guiding rollersso disposed therein that the strop will be caused to traverse said framein parallel paths and in opposite I directions, a blade support mountedin said frame between said strep paths to rock, means on said supportfor securing a blade thereto so as to expose both its edges, arockmember mounted in said frame 1n posirectirns, a blade su portmounted in said frame between sai strop paths to rock, means on saidsupport for securing a blade thereto so as to expose both its edges, areciring member mounted in said frame in position to engage said strop,a spring engaging said rocking member for retracting same, and aconnection between said rocking memher and said blade support,substantially as described.

14. The combination with a frame, of a blade holder having means forpositioning a double edged blade for exposing both edges thereof mounted"on the frame, strep guides on the frame located in position to guide astrop past the opposite sides of the holder, a strop disposed on theguides, and bolder actuating means for causing the re spective edges ofthe blade held thereby to alternately engage the strep at the .respective sides of the holder.

In testimony whereof, I have hereunto set my name in the presence of twosubscribing witnesses.

'WILLIAM H. CRIGHTON-CLARKE. Witnesses: AnoLPH F. DrNsE,

CHARLES F. SCHENBER.

